DCT(Discrete Cosine Transform) transforming coding has been widely used coding-standards such as JPEG

MPEG and H.26x exclusive of JPEG2000 at present. The compressing codings for image/video signals have been advanced to a new stage since the EZW(Embedded Zerotree Wavelet) had been introduced by Shapiro and the SPIHT(Set partition in hierarchical trees) applied by Said et al

which are a competitive challenge against the conventional DCT's coding. However

DCT's coefficients have a similar multiresolutional attributes after reorganization its datum like wavelet transforming. There are many excellent performances in the based-DCT such as arbitrarily shaped DCT

region support DCT and morphological representation of DCT coefficients are proposed.Digital watermarking

image resizing and pattern cognition can be done through utilizing DCT's coefficients

and so on.The capability and performance of the DCT have further been promoted to a higher phase. For instance

object-based coding for DCT is a promising technique for next-generation coding.Besides

the experiments show that MR-DCT(Morphological representation of DCT) is among the state-of-the-art DCT-based image coders reported in the literature.What mentioned above have been studied and analyzed deeply in this paper.Hereby

the future development of DCT is also conjected.